When nanobot is installed via uv tool install, sys.executable points to
a Python that does not have pip available as a module. _pip_install_argv
and _pip_uninstall_argv always used [sys.executable, -m, pip, ...]
which fails in that environment.
Add _pip_available() helper that checks importlib.util.find_spec('pip').
When pip is not available and uv is on PATH, fall back to:
uv pip install --python <sys.executable> ...
uv pip uninstall --python <sys.executable> -y ...
If neither pip nor uv is available, raise CliAppError.
Fixes#4158
Add Cmd/Ctrl+Shift+O shortcut to start a new chat, matching the
convention used by ChatGPT, Claude.ai, and Gemini.
Addresses #4178
Signed-off-by: axelray-dev <110029405+axelray-dev@users.noreply.github.com>
axelray-devandXubin Ren